HUNTSVILLE, Alabama -- The driver of a truck involved in a deadly collision with a motorcyclist this morning on Alabama 53 was charged hours later at a traffic stop for driving under the influence and possession of a controlled substance, according to Huntsville police spokesman Dr. Harry Hobbs.

Jason Christopher Gentle of Huntsville was charged and booked into the Madison County jail Friday, Hobbs said. Earlier this morning, around 5:30 a.m., his truck collided with a motorcycle driven by 73-year-old Robert M. Walker of Ardmore, Tenn., police said. Walker was transported to Huntsville Hospital, where he died, police said. Gentle had cooperated with police at the scene of the accident.

Hobbs said police are awaiting toxicology reports on Gentle to determine if any further charges will be brought.

The accident occurred on Alabama 53, south of Kelly Spring Road, police said. Police said Walker was traveling south on Alabama 53 when his motorcycle was hit by Gentle's north-bound truck that had veered into the southbound lane.

Police had to close parts of Alabama 53 for almost two hours before reopening it.

* Updated at 5 p.m. to show Gentle had cooperated with police at the scene of the accident.